<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style>
			input[type=checkbox]+label:before {
				height: 16px;
				line-height: 16px;
				width: 16px;
				border: 1px solid #000;
				display: inline-block;
				vertical-align: top;
				text模拟-align: center;
				margin-right: 5px;
				content: "\2713";
				color: transparent;
				transition: color ease .3s;
			}
			input[type=checkbox]:checked+label:before {
				color: #000;
			}
		</style>
	</head>
	<body>
		<div id="box">
			<input type="checkbox" id="check" name="check" />
			<label for="check">Checkbox</label>
		</div>
	</body>
</html>
